The ECS-.327-12.5-12QS-TR is an ultra-miniature SMD AEC-Q200 qualified tuning fork crystal designed for precision timekeeping applications. This 32.768 kHz crystal features a load capacitance of 12.5 pF, frequency tolerance of ±20 ppm at +25°C, and a temperature coefficient of -0.028 to -0.040 ppm/°C². The device operates over a temperature range of -40°C to +125°C with an equivalent series resistance of 90 kO maximum and shunt capacitance of 1.2 pF. The compact SMD package (2.0 × 1.2 × 0.55 mm) combined with RoHS compliance, TS16949 certified production, and MSL 1 rating makes it ideal for real-time clock applications, wearables, IoT devices, and automotive systems requiring reliable frequency stability in space-constrained environments.